{"product_id":"zilmet-ztta-12-thermal-expansion-tank-5-gallon","title":"Zilmet ZTTA-12 Thermal Expansion Tank 5 Gallon","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe ZILMET ZTTA-12 is a 5-gallon thermal expansion tank designed to absorb excess pressure caused by thermal expansion in closed-loop potable water and hydronic heating systems. Fitted with a fixed diaphragm, the tank separates the system water from the pre-charged air chamber, protecting pipes, valves, and water heaters from overpressure damage. This type of component is typically installed by licensed plumbers and HVAC technicians as part of a code-compliant closed water system.\u003c\/p\u003e\u003cp\u003eThe ZTTA-12 is suited for residential and light commercial applications where a backflow preventer or pressure-reducing valve creates a closed system. Common install scenarios include domestic hot water systems paired with storage-type water heaters, as well as hydronic heating loops requiring pressure management. Its 5-gallon capacity makes it appropriate for small to mid-sized system volumes.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e5-gallon tank capacity for residential and light commercial closed systems\u003c\/li\u003e\n\u003cli\u003eFixed diaphragm construction separates air charge from system water\u003c\/li\u003e\n\u003cli\u003eDesigned to protect plumbing components from thermal expansion overpressure\u003c\/li\u003e\n\u003cli\u003eCompact form factor suited for typical mechanical room installations\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as an OEM-style replacement or new-installation expansion tank for closed-loop potable water and hydronic heating systems requiring thermal expansion management.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation should be performed by a licensed plumber in accordance with local plumbing codes and IPC guidelines. Shut off the water supply and relieve system pressure before installation. Verify the tank pre-charge pressure matches system supply pressure prior to connecting. Do not exceed the rated working pressure of the tank or system.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCapacity\u003c\/strong\u003e: 5 gallons\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDiaphragm Type\u003c\/strong\u003e: Fixed\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeight\u003c\/strong\u003e: 26.5 inches\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eStandard Information\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand\u003c\/strong\u003e: ZILMET\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: ZTTA-12\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"ZILMET","offers":[{"title":"Default Title","offer_id":51506567282994,"sku":"ZTTA-12","price":1524.78,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/zilmet-ZXTA.jpg?v=1784925956","url":"https:\/\/voomisupply.com\/products\/zilmet-ztta-12-thermal-expansion-tank-5-gallon","provider":"Voomi Supply","version":"1.0","type":"link"}